WO2022061516A1

WO2022061516A1 - Control circuit and battery

Info

Publication number: WO2022061516A1
Application number: PCT/CN2020/116837
Authority: WO
Inventors: 潘启辉; 肖想民; 谢绍伟; 阳林华; 韩巧瑜; 杨宝锋; 刘洋
Original assignee: 海能达通信股份有限公司
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2022-03-31
Also published as: DE212020000836U1

Abstract

The present application provides a control circuit and a battery. The control circuit is applied to the battery, and the battery comprises a cell, a positive output end, and a negative output end. The control circuit comprises a first switch, a second switch, a power-on control unit, and a battery protection unit; the first switch is connected between the negative electrode of the cell and the negative output end, the power-on control unit is connected to the second switch, the power end of the battery protection unit is connected to the positive electrode of the cell by means of the second switch, and the first control end of the battery protection unit is connected to the first switch. When the battery is not connected to a load, the first switch is turned off; and when the battery is connected to the load, the power-on control unit operates to turn on the second switch, and then a channel between the power end of the battery protection unit and the positive electrode of the cell is turned on, so that the battery protection unit operates to turn on the first switch, and a channel between the negative electrode of the cell and the negative output end is turned on. The control circuit can effectively avoid the self-power consumption problem of the battery, does not increase the volume of the battery, and can save costs.

Description

Control circuit and battery

【Technical field】

The present invention relates to the technical field of batteries, in particular to a control circuit and a battery.

【Background technique】

In order to ensure the safe use of rechargeable batteries, a control circuit is often designed inside the rechargeable battery, but the control circuit needs to consume electric energy when working, so that the self-consumption problem of the battery will also occur when the battery is idle.

At present, in order to reduce the self-consumption of the battery when the battery is idle, the power supply of the control circuit is generally turned off when the battery is idle, and the control circuit is powered on when charging or when the corresponding load needs to be powered. The corresponding control ports are designed for the discharge end and the charge end of the controller to control the power-on and power-off of the control circuit.

However, since the above solution needs to add a corresponding control port, it will not only increase the production cost, but also increase the volume of the battery, which is not conducive to the miniaturized production of the product.

[Content of the invention]

The present application provides a control circuit and a battery, the control circuit can not only enable the battery to supply power to the load, but also can effectively avoid the problem of battery self-consumption when the battery is idle; meanwhile, the volume of the battery will not be increased, and the production cost can be saved.

In order to solve the above technical problems, the first technical solution adopted in this application is to provide a control circuit, which is applied to a battery, and the battery includes a battery cell, a positive output terminal and a negative output terminal, and a positive output terminal and a negative output terminal. The terminal is used to connect the power supply terminal of the load respectively to supply power to the load; the positive input terminal is connected to the positive pole of the cell, wherein the control circuit includes a first switch, a second switch, a power-on control unit and a battery protection unit; wherein, the first switch It is connected between the negative electrode of the battery cell and the negative output terminal, wherein when the battery is not connected to the load, the first switch controls the path between the negative electrode of the battery cell and the negative output terminal to be disconnected, and the voltage on the negative electrode of the battery cell is used as ground voltage; the power-on control unit is connected to the second switch, wherein when the battery is connected to the load, the power-on control unit works to turn on the second switch; the battery protection unit includes a power terminal, a ground terminal and a first control terminal, wherein the battery The ground terminal of the protection unit is connected to the ground voltage, the power terminal of the battery protection unit is connected to the positive pole of the battery cell through the second switch, and the first control terminal of the battery protection unit is connected to the first switch; when the second switch is turned on, the battery The path between the power supply terminal of the protection unit and the positive pole of the battery cell is turned on, so that the battery protection unit works, and the first control terminal of the battery protection unit sends a first control signal to turn on the first switch and turn on the power supply of the battery cell. The path between the negative pole and the negative output terminal.

The power-on control unit includes a first power-on control module and a second power-on control module; wherein the first power-on control module is connected to the negative output terminal and the second switch, wherein the first power-on control module receives the negative output terminal When the battery is connected to the load, the positive electrode of the battery cell is connected through the load, so as to work to turn on the second switch; and after the first switch is turned on, the first power-on control module stops working; the second power-on control module stops working; The electrical control module is connected to the second switch, wherein when the second switch is turned on, the second power-on control module works, so that after the first power-on control module stops working, the second power-on control module controls the second switch to continue on.

Wherein, the first power-on control module includes a third switch; wherein, the control terminal of the third switch is connected to the negative output terminal, the first channel terminal of the third switch is connected to the control terminal of the second switch, and the first channel terminal of the third switch is connected to the negative output terminal. The two channel terminals are connected to the ground voltage.

The second power-on control module includes a fourth switch, wherein the control terminal of the fourth switch is connected to the first node between the second switch and the power terminal of the battery protection unit, and the first channel terminal of the fourth switch is connected to The control terminal of the second switch and the second pass terminal of the fourth switch are connected to the ground voltage; wherein, after the second switch is turned on, the control terminal of the fourth switch receives the positive electrode of the cell through the second switch that is turned on The voltage on the fourth switch is turned on, and the second power-on control module works to make the second switch continue to be turned on.

The second power-on control module further includes a resistor, and the control terminal of the fourth switch is connected to the first node between the second switch and the power terminal of the battery protection unit through the resistor.

Wherein, the battery protection unit further includes a data port and a second control port, wherein the data port is used for connecting with the data port of the load for data communication when the battery is connected to the load; when the data port interrupts the data communication with the load After the real-time duration exceeds the preset duration, or when the data received by the data port indicates that the working current of the battery cell is lower than the preset current value and the real-time duration exceeds the preset duration, the battery protection unit sends a second control signal at the second control port , so that the second power-on control module stops working.

Wherein, the power-on control unit further includes a power-off control module; wherein, the power-off control module is connected to the second control terminal of the battery protection unit and the second power-on control module, and when the second control terminal sends a second control signal, the power-off control module The control module works, so that the second power-on control module stops working.

The power-off control module includes a fifth switch; wherein the control terminal of the fifth switch is connected to the second control terminal of the battery protection unit, the first channel terminal of the fifth switch is connected to the second power-on control module, and the fifth switch is connected to the second power-on control module. The second path terminal is connected to the ground voltage.

The first switch, the third switch, the fourth switch and the fifth switch are respectively N-type MOS transistors, and the second switch is a P-type MOS transistor.

In order to solve the above technical problem, the second technical solution adopted in the present application is to provide a battery, which includes the above-mentioned control circuit.

In the control circuit and battery provided by the present application, the control circuit is provided with a first switch and a second switch, and the first switch is connected between the negative electrode of the battery cell and the negative output end of the battery, and at the same time when the battery is not connected to the load, The first switch is disconnected to disconnect the path between the negative electrode of the battery cell and the negative output terminal, thereby effectively avoiding the problem of battery self-consumption when the battery is idle; in addition, by setting the power-on control unit, the power-on control unit is The second switch is connected, so that when the battery is connected to the load, the power-on control unit works to turn on the second switch; in addition, by setting the battery protection unit and connecting the ground terminal of the battery protection unit to the ground voltage, the power supply terminal of the battery protection unit It is connected to the positive pole of the battery cell through the second switch, and the first control terminal of the battery protection unit is connected to the first switch, so that when the second switch is turned on, the connection between the power supply terminal of the battery protection unit and the positive pole of the battery cell is connected. The path is turned on, so that the battery protection unit works, and at the same time, the first control terminal of the battery protection unit sends a first control signal to turn on the first switch, and then the path between the negative electrode of the cell and the negative output terminal is turned on, so that The load supplies power; compared with the solution in the prior art that requires additionally adding a corresponding control port, this solution does not increase the volume of the battery and can save production costs.

【Description of drawings】

FIG. 1 is a schematic structural diagram of a control circuit and a battery cell according to a first embodiment of the present application;

FIG. 2 is a schematic structural diagram of a control circuit and a battery cell according to a second embodiment of the present application;

FIG. 3 is a schematic structural diagram of a control circuit and a battery cell according to a third embodiment of the present application;

FIG. 4 is a schematic structural diagram of a control circuit and a battery cell according to a fourth embodiment of the present application;

5 is a schematic structural diagram of a control circuit provided by a fifth embodiment of the present application;

FIG. 6 is a schematic structural diagram of a control circuit provided by a specific embodiment of the present application;

FIG. 7 is a schematic structural diagram of a control circuit provided by the sixth embodiment of the present application;

FIG. 8 is a schematic structural diagram of a control circuit provided by another specific embodiment of the present application;

9 is a waveform diagram of each time stage of a control circuit provided by an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a battery provided by an embodiment of the present application.

【detailed description】

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The terms "first", "second" and "third" in this application are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first", "second", "third" may expressly or implicitly include at least one of that feature. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined. All directional indications (such as up, down, left, right, front, rear...) in the embodiments of the present application are only used to explain the relative positional relationship between components under a certain posture (as shown in the accompanying drawings). , motion situation, etc., if the specific posture changes, the directional indication also changes accordingly. Furthermore, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally also includes For other steps or units inherent to these processes, methods, products or devices.

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor a separate or alternative embodiment that is mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

The present application will be described in detail below with reference to the accompanying drawings and embodiments.

Please refer to FIG. 1 , which is a schematic structural diagram of a control circuit and a battery cell according to a first embodiment of the application; in this embodiment, a control circuit is provided, and the control circuit is applied to a battery; the battery specifically includes a battery cell. core, the positive output terminal P+ and the negative output terminal P-, wherein the positive output terminal P+ and the negative output terminal P- are used to connect the power supply terminals of the load respectively, so as to supply power to the load when the battery is connected to the load; The positive output terminal P+ is connected to the positive pole of the cell.

In one embodiment, the control circuit includes a first switch M1, a second switch M2, a power-on control unit 11, and a battery protection unit 12; wherein the battery protection unit 12 includes a power terminal VCC, a ground terminal GND, and a first control terminal DO. .

The first switch M1 is connected between the negative electrode of the battery cell and the negative output terminal P- of the battery, and when the battery is not connected to the load, the first switch M1 controls the path between the negative electrode of the battery cell and the negative output terminal P- Disconnected; in a specific embodiment, when the battery is not connected to the load, the first switch M1 can be in the disconnected state to disconnect the path between the negative electrode of the battery cell and the negative output terminal P; wherein, the first switch M1 The disconnected state may specifically mean that the first switch is in the disconnected state when it is in the first position, and is in the closed state when it is in the second position. This embodiment does not limit this, as long as the negative electrode and the negative output end of the cell can be controlled. The path between P- can be disconnected; it is understandable that after the path between the negative electrode of the control cell and the negative output terminal P- of the first switch M1 is disconnected, the cell stops supplying power to the control circuit, thereby preventing the battery from supplying power. The self-consumption problem of the control circuit occurs when it is idle; specifically, refer to Figure 1, at this time, the voltage on the negative electrode of the cell is used as the ground voltage GND.

The power-on control unit 11 is connected to the second switch M2, and when the battery is connected to the load, that is, the positive output terminal P+ and the negative output terminal P- of the battery are connected to the load, the power-on control unit 11 works to control the second switch M2 is turned on.

In one embodiment, referring to FIG. 1 , the power-on control unit 11 is connected to the negative output terminal P- and the second switch M2, and when the battery is connected to the load, that is, the positive output terminal P+ and the negative output terminal P- of the battery are connected to the load. When connected, the power-on control unit 11 works to turn on the second switch M2.

Specifically, referring to FIG. 2 , FIG. 2 is a schematic structural diagram of a control circuit and a battery cell according to a second embodiment of the present application; the power-on control unit 11 specifically includes a first power-on control module 111 and a second power-on control module 112 .

The first power-on control module 111 is connected to the negative output terminal P- of the battery and the second switch M2; specifically, the first power-on control module 111 receives the voltage on the negative output terminal P-, so that when the battery is connected to the load, By receiving the voltage control signal from the load and starting to work, the second switch M2 is turned on, so as to be connected to the positive electrode of the cell; it should be noted that after the first switch M1 is turned on, the first power-on control module 111 Stop working, and the second power-on control module 112 starts working.

It can be understood that when the battery is connected to the load, the first power-on control module 111 receives the voltage from the negative output terminal P- of the battery and works to control the second switch M2 to be turned on.

In a specific embodiment, the first power-on control module 111 includes a third switch M3; specifically, the third switch M3 includes a control terminal, a first channel terminal and a second channel terminal; wherein, the control terminal of the third switch M3 Connected to the negative output terminal P- of the battery, the first pass terminal of the third switch M3 is connected to the control terminal of the second switch M2, and the second pass terminal of the third switch M3 is connected to the ground voltage GND.

Wherein, the second power-on control module 112 is connected to the second switch M2; in the specific implementation process, when the second switch M2 is turned on, the second power-on control module 112 starts to work to stop the first power-on control module 111 After the operation, the second switch M2 is controlled by the second power-on control module 112 to be continuously turned on, so that the first switch M1 is continuously turned on, so as to continuously supply power to the load.

In a specific embodiment, the second power-on control module 112 specifically includes a fourth switch M4, and the fourth switch M4 includes a control terminal, a first channel terminal, and a second channel terminal; wherein, the control terminal of the fourth switch M4 is connected to the The first node between the second switch M2 and the power supply terminal VCC of the battery protection unit 12, the first channel terminal of the fourth switch M4 is connected to the control terminal of the second switch M2, and the second channel terminal of the fourth switch M4 is connected to to ground voltage GND. Specifically, after the second switch M2 is turned on, the control terminal of the fourth switch M4 receives the voltage on the positive electrode of the cell through the turned-on second switch M2, so that the fourth switch M4 is turned on. The second power-on control module 112 works and controls the second switch M2 to continue to be turned on.

Further, in an embodiment, referring to FIG. 3 , FIG. 3 is a schematic structural diagram of a control circuit and a battery cell according to a third embodiment of the present application; specifically, the second power-on control module 112 further includes a resistor; specifically, The control terminal of the fourth switch M4 is connected to the first node between the second switch M2 and the power terminal VCC of the battery protection unit 12 through a resistor.

The battery protection unit 12 may specifically be a unit circuit with one or more functions of battery overvoltage or undervoltage protection, overcurrent protection, power detection or battery management; specifically, the ground terminal GND of the battery protection unit 12 Connected to the ground voltage GND, the power supply terminal VCC of the battery protection unit 12 is connected to the positive pole of the cell through the second switch M2, and the first control terminal DO of the battery protection unit 12 is connected to the first switch M1; specifically, when the second switch When M2 is turned on, the path between the power supply terminal VCC of the battery protection unit 12 and the positive electrode of the battery cell is turned on, so that the battery protection unit 12 works; and after the battery protection unit 12 is powered on, the first control of the battery protection unit 12 The terminal DO sends out a first control signal to control the first switch M1 to be turned on, thereby turning on the path between the negative electrode of the cell and the negative output end P- to supply power to the load.

In a specific embodiment, referring to FIG. 4, FIG. 4 is a schematic structural diagram of a control circuit and a battery cell provided by a fourth embodiment of the application; the battery protection unit 12 further includes a data port DA and a second control port OFF, wherein, The data port DA is used to connect with the data port of the load when the battery is connected to the load for data communication between the two.

In a specific embodiment, when the real-time duration of the data port DA of the battery protection unit 12 interrupting the data communication with the load exceeds the preset duration, that is, the real-time communication between the data port DA of the battery protection unit 12 and the data port of the load is interrupted. After the duration exceeds the preset duration, or when the data received by the data port DA indicates that the working current of the battery cell is lower than the preset current value and the real-time duration exceeds the preset duration, the battery protection unit 12 sends a second control at the second control port OFF. signal, so that the second power-on control module 112 stops working, so that the second switch M2 is turned off, and then the first switch M1 is controlled to be turned off, so that the battery stops supplying power to the load, thereby saving power resources and reducing the battery protection unit The power consumption of 12% makes the battery enter a power saving state; at the same time, compared with the solution in the prior art that requires additionally adding a corresponding control port, the above solution of the present application can not only make the battery supply power for the load, but also can effectively avoid the battery being idle. When the battery self-consumption problem occurs, the volume of the battery will not be increased, and the cost can be saved.

Specifically, referring to FIG. 4 , the power-on control unit 11 further includes a power-off control module 113 , and the battery protection unit 12 specifically controls the second power-on control module 112 to stop working through the power-off control module 113 ; specifically, the power-off control module 113 Connect the second control port OFF of the battery protection unit 12 and the second power-on control module 112, when the second control port OFF sends out the second control signal, the power-off control module 113 contacts the second control signal and starts to work, so that the first Second, the power-on control module 112 stops working.

Specifically, in a specific embodiment, the power-off control module 113 includes a fifth switch M5, and the fifth switch M5 includes a control terminal, a first channel terminal and a second channel terminal; wherein, the control terminal of the fifth switch M5 is connected to the battery The second control port of the protection unit 12 is OFF, the first channel terminal of the fifth switch M5 is connected to the second power-on control module 112 , and the second channel terminal of the fifth switch M5 is connected to the ground voltage GND.

Specifically, the first switch M1 , the third switch M3 , the fourth switch M4 and the fifth switch M5 are respectively N-type MOS transistors, and the second switch M2 is a P-type MOS transistor. Of course, in other embodiments, the first switch M1 , the second switch M2 , the third switch M3 , the fourth switch M4 and the fifth switch M5 can also be transistors or relays.

In the control circuit provided by this embodiment, the first switch M1 and the second switch M2 are set, and the first switch M1 is connected between the negative electrode of the battery cell and the negative output terminal P-, and when the battery is not connected to the load, the The first switch M1 is turned off to disconnect the path between the negative electrode of the cell and the negative output terminal P-, so as to effectively avoid the problem of battery self-consumption when the battery is idle; The electrical control unit 11 is connected to the negative output terminal P- and the second switch M2, so that when the battery is connected to the load, the power-on control unit 11 works to turn on the second switch M2; The ground terminal GND of the unit 12 is connected to the ground voltage GND, the power terminal VCC of the battery protection unit 12 is connected to the positive pole of the cell through the second switch M2, and the first control terminal DO of the battery protection unit 12 is connected to the first switch M1 to When the second switch M2 is turned on, the path between the power supply terminal VCC of the battery protection unit 12 and the positive electrode of the battery cell is turned on, so that the battery protection unit 12 works, and at the same time, the first control terminal DO of the battery protection unit 12 is turned on. The first control signal is sent to turn on the first switch M1, and then the path between the negative electrode of the cell and the negative output terminal P- is turned on to supply power to the load; compared with the prior art, which requires additional corresponding control ports The solution does not increase the volume of the battery and can save the production cost.

In this embodiment, a battery is provided, which includes a battery cell, a positive output end, a negative output end, and a control circuit.

Wherein, the control circuit is the control circuit involved in any of the above-mentioned embodiments, and the connection relationship between the control circuit and the battery cell, the positive output terminal and the negative output terminal, and other structures and functions are the same as the control circuit provided in the above-mentioned embodiment. The connection relationship and other structures and functions between the above-mentioned cells, the positive output terminal P+ and the negative output terminal P- are the same or similar, and can achieve the same or similar technical effects. Repeat.

In the battery provided by this embodiment, when the battery is not connected to the load, the first switch is turned off to disconnect the path between the negative electrode of the battery cell and the negative output terminal, thereby effectively avoiding the problem of battery self-consumption when the battery is idle; At the same time, when the battery is connected to the load, the first switch is controlled to be closed, so that the battery supplies power to the load, and the real-time duration when the battery is idle or the data communication with the load is interrupted reaches the preset duration or when the working current of the battery cell is lower than the preset duration After the real-time duration of the current value exceeds the preset duration, the control circuit can be disconnected from the battery cell in time, so that the battery enters a power-saving state to save power resources and avoid the problem of battery self-consumption; in addition, the battery does not need to be additionally installed Corresponding control ports not only do not increase the volume of the battery, but also save the production cost.

In another embodiment, referring to FIG. 5, FIG. 5 is a schematic structural diagram of a control circuit provided by a fifth embodiment of the application; in this embodiment, a control circuit is provided; the difference from the above-mentioned embodiment is that the control circuit Also includes a communication data port DA', the communication data port DA' is connected with the data port DA on the battery protection unit 12 to perform data communication with the load through the communication data port DA' when the load is connected; further, in this implementation In the example, different from the above-mentioned first embodiment, the power-on control unit 11 specifically includes an auxiliary circuit, a first control circuit and a second control circuit.

Wherein, the power-on control unit 11 is connected to the negative output terminal P- and the communication data port DA', so that when the positive output terminal P+ and the negative output terminal P- are connected to the load, the negative output terminal P- or the communication data port can be connected to the negative output terminal P- or the communication data port in turn. DA' receives the first control signal and connects the positive output terminal P+ with the second switch M2 under the driving of the first control signal, so that the second switch M2 can receive the second control signal from the positive output terminal P+, and in the second It is turned on under the driving of the control signal to connect the battery protection unit 12 and the positive output terminal P+ through the second switch M2.

Specifically, after the positive output terminal P+ and the negative output terminal P- are connected to the corresponding terminals of the load, and the negative pole of the cell is not connected to the negative output terminal P-, the power-on control unit 11 receives the first power from the negative output terminal P-. A control signal is connected to the positive output terminal P+ under the driving of the first control signal, and then the negative electrode of the cell is connected to the negative output terminal P-, so that the cell can supply power to the load; when the load is powered on, the power-on control The unit 11 in turn receives the first control signal from the communication data port DA' and continuously maintains the connection with the positive output terminal P+ under the driving of the first control signal, and then drives the negative electrode of the battery cell to continuously communicate with the negative output terminal P- to Make the battery continue to supply power to the load.

The battery protection unit 12 is connected to the power-on control unit 11 through the second switch M2, and is connected to the negative output terminal P- through the first switch M1; and when the positive output terminal P+ and the negative output terminal P- are connected to the load, the second The switch M2 receives the second control signal from the power-on control unit 11 and connects the battery protection circuit 12 with the positive electrode of the battery cell under the driving of the second control signal. After the battery protection circuit 12 is connected with the positive electrode of the battery cell, the battery protection The circuit 12 is powered on, and sends a third control signal to the first switch M1. The first switch M1 receives the third control signal from the battery protection unit 12 and connects the negative electrode of the cell to the negative output end of the battery under the drive of the third control signal. P-connected so that the cells supply power to the load.

In the control circuit provided in this embodiment, the power-on control unit 11 is connected to the negative output terminal P- and the communication data port DA', so that the power-on control unit 11 is connected to the load after the positive output terminal P+ and the negative output terminal P- are connected to the load. , the first control signal can be received from the negative output terminal P- and the communication data port DA' in turn, and the positive output terminal P+ and the second switch M2 can be connected under the driving of the first control signal, so that the second switch M2 can be connected from the The positive output terminal P+ receives the second control signal and is turned on; in addition, by setting the battery protection unit 12, the battery protection unit 12 is connected to the positive pole of the cell through the second switch M2, and is connected to the negative output terminal through the first switch M1 P-connection to connect the battery protection unit 12 with the positive pole of the battery cell after the second switch M2 receives the second control signal from the power-on control unit 11, and the first switch M1 receives the third signal from the battery protection unit 12 After the control signal, the negative electrode of the cell is connected to the negative output terminal P-, so that the cell can supply power to the load; wherein, since the negative electrode of the cell is connected to the negative output terminal P-, the power-on control unit 11 can connect the power-on control unit 11 from the communication data port DA' continues to receive the first control signal, so as to continuously control the negative electrode of the cell to communicate with the negative output terminal P- through the first control signal, so that the cell can continue to supply power to the load; compared with the control circuit in the prior art It is necessary to add a corresponding control port solution, which can not only enable the battery cell to supply power to the load, but also effectively avoid the self-consumption problem of the control circuit when the battery cell is idle, and at the same time, it will not increase the volume of the battery with the control circuit. , which can save production costs.

Please refer to FIG. 6 , which is a schematic structural diagram of a control circuit provided by a specific embodiment of the present application; specifically, the power-on control unit 11 includes an auxiliary circuit, a first control circuit and a second control circuit.

Wherein, the auxiliary circuit is connected to the positive output terminal P+ and the second switch M2, and is used for outputting the second control signal to the second switch M2 when turned on; the first control circuit is connected to the negative output terminal P- and the auxiliary circuit, and is used for When the positive output terminal P+ and the negative output terminal P- are connected to the load, they receive the first sub-control signal from the negative output terminal P- and conduct under the control of the first sub-control signal. The auxiliary circuit outputs a corresponding control signal to control the conduction of the auxiliary circuit; the second control circuit is connected to the communication data port DA' and the auxiliary circuit, and after the negative electrode of the battery cell is connected to the negative output end P-, it receives data from the communication data port DA' The second sub-control signal is turned on under the control of the second sub-control signal. After the second control circuit is turned on, the corresponding control signal is sent to the auxiliary circuit to continuously control the auxiliary circuit to be turned on, thereby making the positive output terminal P+ It communicates with the second switch M2 through the auxiliary circuit.

Specifically, the auxiliary circuit may include a sixth switch M6; the first control circuit may include a seventh switch M7; and the second control circuit may include an eighth switch M8.

Specifically, the sixth switch M6 includes a first channel terminal, a second channel terminal and a control terminal, the first channel terminal of the sixth switch M6 is connected to the control terminal of the second switch M2, and the second channel terminal of the sixth switch M6 is connected to the control terminal of the second switch M2. The positive output terminal P+ is connected to output a second control signal to the second switch M2 when the sixth switch M6 is turned on; the seventh switch M7 includes a first channel end, a second channel end and a control end, and the seventh switch M7 A channel terminal is grounded, the second channel terminal of the seventh switch M7 is connected to the control terminal of the sixth switch M6, and the control terminal of the seventh switch M7 is connected to the negative output terminal P- to receive the first sub-terminal from the negative output terminal P- control signal and control the sixth switch M6 to be turned on; the eighth switch M8 includes a first channel end, a second channel end and a control end, the first channel end of the eighth switch M8 is grounded, and the second channel end of the eighth switch M8 is connected to the The control terminal of the sixth switch M6 is connected, and the control terminal of the eighth switch M8 is connected to the communication data port DA to receive the second sub-control signal from the communication data port DA to continuously control the sixth switch M6 to be turned on.

Please refer to FIG. 7 , which is a schematic structural diagram of a control circuit according to a sixth embodiment of the present application. In one embodiment, the control circuit further includes a delay unit 14 .

8, FIG. 8 is a schematic structural diagram of a control circuit provided by another specific embodiment of the present application; the delay unit 14 is respectively connected to the power-on control unit 11 and the battery protection unit 12; specifically, the delay unit 14 includes Storage capacitor CT and integration delay unit 141 .

Specifically, one end of the storage capacitor CT is connected to the power-on control unit 11, and the other end is connected to the ground voltage GND; when the positive output terminal P+ and the negative output terminal P- are connected to the load, the storage capacitor CT is used to store charges, so that the first switch M1 maintains the driving of the integral delay unit 141 after the negative electrode of the battery cell and the negative output terminal P- are turned on until the load and the battery start to send data communication, and maintains the integral delay during the period when the pulse signal of the communication data port DA is kept at a low level. The driving of the unit 141, that is, the driving of the ninth switch M9 is continuously turned on.

Specifically, the charging resistance of the storage capacitor CT should be as small as possible to improve the charging speed of the storage capacitor CT, and the discharge resistance should be as large as possible to ensure that the holding voltage of the storage capacitor CT has a sufficient time for the integration delay unit 141 drive, so as to avoid the problem of discharge interruption during the normal power supply time of the cell.

Specifically, one end of the integration delay unit 141 is connected to the storage capacitor CT, and the other end is connected to the battery protection unit 12 through the second switch M2.

In a specific embodiment, the integration delay unit 141 can delay the conduction of the second switch M2, so that when the charging voltage of the storage capacitor CT is close to the voltage of the positive output terminal P+, the battery protection unit 12 and the positive output terminal P+ can be turned on , to avoid frequent circuit interruptions.

Specifically, referring to FIG. 8 , the integral delay unit 141 includes a resistor RD, a capacitor CD and a ninth switch M9; wherein, one end of the resistor RD is connected to the storage capacitor CT, the other end is connected to the control end of the ninth switch M9, and the capacitor CD is connected to the control end of the ninth switch M9. One end of the ninth switch M9 is connected to the resistor RD, the other end of the capacitor CD is connected to the ground voltage, the first channel end of the ninth switch M9 is connected to the battery protection unit 12 through the second switch M2, and the second channel end of the ninth switch M9 is connected to the ground voltage GND. Among them, the resistor RD and the capacitor CD are used to delay the conduction of the ninth switch M9, so that the charging voltage on the storage capacitor CT is close to the voltage of the positive output terminal P+, and then the ninth switch M9 is turned on, so as to avoid frequent circuit interruptions. question.

In a specific embodiment, the storage capacitor CT is used to connect the load with the positive output terminal P+ and the negative output terminal P-, and after the first switch M1 turns on the negative electrode of the cell and the negative output terminal P-, the load and the battery start During the data communication period, the ninth switch M9 is maintained to be driven, so that the power-on control unit 11 is connected to the control terminal of the second switch M2 through the ninth switch M9; so that the second switch M2 can receive the data from the power-on control unit 11, and under the driving of the second control signal, the battery protection unit 12 is connected to the positive pole of the cell, and then the negative pole of the cell is connected to the negative output terminal P-, so that the cell can supply power to the load At the same time, the driving of the ninth switch M9 is maintained during the low level period of the communication data port DA pulse signal.

Specifically, the sixth switch M6, the seventh switch M7, the eighth switch M8, and the ninth switch M9 may be MOS transistors, transistors or relays.

Specifically, the seventh switch M7, the eighth switch M8 and the ninth switch M9 may be N-type transistors, and the sixth switch M6 may be a P-type transistor.

In the control circuit provided by this embodiment, by further setting the delay unit 14 and connecting the delay unit 14 to the power-on control unit 11 and the battery protection unit 12 respectively, not only the battery cell can supply power to the load, but also the battery cell can be effectively avoided. The problem of self-consumption of the control circuit occurs when it is idle; the volume of the battery with the control circuit will not be increased, and the production cost can be saved; at the same time, by setting the storage capacitor CT, the battery can be charged in the process of charging the load. It avoids the problem of frequent charging interruptions, and at the same time can prolong the charging time of the battery cells to the load.

It should be noted that, the above-mentioned control signal may specifically be a level signal.

The working principle of the control circuit will be described in detail below.

Specifically, when the battery cell is in an idle state, the negative output terminal P- and the communication data port DA have no voltage, and the sixth switch M6, the seventh switch M7, the eighth switch M8 and the ninth switch M9 are turned off due to no-voltage driving. At this time, the battery protection unit 12 has no power supply, the positive output terminal P+ and the negative output terminal P- of the battery cell have no discharge output, and the entire circuit is in a power-saving state, which can effectively avoid the self-consumption of the control circuit when the battery cell is idle. electrical problem.

When the battery is connected to the load, that is, the positive output terminal P+ and the negative output terminal P- of the battery are respectively connected to the corresponding terminals of the load, the high voltage of the battery is output from the positive electrode of the battery cell through the positive output terminal P+, and is added by the load leakage current. To the negative output terminal P- of the battery, the seventh switch M7 receives the first sub-control signal from the negative output terminal P- and is turned on under the driving of the first sub-control signal, and then drives the sixth switch M6 to be turned on, and then turns on. The storage capacitor CT is charged, the voltage on the storage capacitor CT is integrated and delayed by the resistor RD and the capacitor CD to drive the ninth switch M9 to be turned on, and the second switch M2 is turned on after receiving the second control signal from the power-on control unit 11, Then, the battery protection unit 12 is connected to the positive pole of the battery cell, and the battery protection unit 12 is supplied with power; after the battery protection unit 12 supplies power, it outputs a third control signal to the first switch M1, and the first switch M1 receives the third control signal and generates power in the third Driven by the control signal, it is turned on to connect the negative electrode of the cell with the negative output terminal P-, and the cell starts to supply power to the load. After the first switch M1 is turned on, that is, after the negative electrode of the cell is connected to the negative output terminal P- through the first switch M1, the negative output terminal P- is connected to the ground voltage GND, and the seventh switch M7 loses the first sub-control due to The signal is turned off. During the period when the seventh switch M7 is turned off, the ninth switch M9 and the second switch M2 are continuously driven by the voltage maintained on the storage capacitor CT to continue to be turned on. The battery protection unit 12 can continue to work, driving the battery cells to the load. Power supply; when the load is powered on and started, the load and the battery communicate with the battery through the communication data port DA. At this time, the communication data port DA can be used to receive the second sub-control signal, and the second sub-control signal is driven to drive the eighth. The switch M8 is turned on, and then the sixth switch M6 is continuously driven to be turned on, thereby controlling the second switch M2 to continue to be turned on, so that the battery cell can continue to supply power to the load; this not only enables the battery cell to supply power to the load, but also does not increase The volume of the battery with the control circuit can save the production cost.

Please refer to FIG. 9. FIG. 9 is a waveform diagram of each time stage of the control circuit provided by an embodiment of the application. Specifically, when the control circuit is working, it includes a first time stage t1, a second time stage t2, and a third time stage t3, the fourth time period t4 and the fifth time period t5; wherein, the first time period t1 is the time required for the storage capacitor CT to be fully charged after the negative output terminal P- is energized, that is, after the negative output terminal P- is energized, the storage capacitor CT is fully charged. The time required for the voltage of the capacitor CT to reach the same voltage as the positive output terminal P+; the second time period t2 is the time required for the ninth switch M9 to be turned on after the negative output terminal P- is energized; the third time period t3 is The time required from the turn-on of the first switch M1 to the start of data communication between the load and the battery; the fourth time period t4 is the longest low level time of the communication data port DA; the fifth time period t5 is the separation of the battery and the load (that is, the positive The time required for the output terminal P+ and the negative output terminal P- to be disconnected from the load) to the disconnection of the ninth switch M9.

Specifically, in the first time period t1, the positive output terminal P+ and the negative output terminal P- are respectively connected to the corresponding terminals of the load, and the high voltage of the battery is output from the positive electrode of the cell through the positive output terminal P+, and is added to the load leakage current through the load leakage current. The negative output terminal P- of the battery, at this time, the negative output terminal P- is at a high level, which drives the seventh switch M7 and the sixth switch M6 to conduct, and starts to charge the storage capacitor CT until the voltage across the storage capacitor CT and the positive output The voltage of the terminal P+ is the same; at the same time, the storage capacitor CT slowly discharges to the capacitor CD; at this stage, the first switch M1 and the second switch M2 are disconnected, and no data communication is performed between the battery communication data port DA and the load.

In the second time period t2, the storage capacitor CT continues to discharge to the capacitor CD while being charged until the voltage across the capacitor CD can drive the ninth switch M9 to conduct, that is, the control terminal of the second switch M2 can pass the ninth switch M9 is connected to the power-on control unit 11 . Specifically, in this period of time, both ends of the negative output terminal P- and the storage capacitor CT are at a high level, the second switch M2 and the first switch M1 are still in an off state, and the communication data port DA of the battery is connected to the load. No data communication is performed between them.

In the third time period t3, the storage capacitor CT is at a high level, and continues to charge the capacitor CD until it reaches the same voltage as the storage capacitor CT. The ninth switch M9 is turned on under the drive of the high-level signal, thereby driving the first switch M9. The second switch M2 and the first switch M1 are turned on, and the load starts to perform initialization processing; at this time, the negative output terminal P-ground voltage GND, and the seventh switch M7 is disconnected because it cannot receive the control signal from the negative output terminal P- again; There is no data communication between the communication data port DA of the battery and the load.

In the fourth time period t4, the negative output terminal P- is at a low level, the communication data port DA is at a low level, and the storage capacitor CT and the capacitor CD are at a high level. At this stage, the storage capacitor CT continues to discharge to drive the first The nine switches M9, the second switch M2 and the first switch M1 are turned on.

At the fifth time period t5, the load is disconnected from the positive output terminal P+ and the negative output terminal P- of the battery, the negative output terminal P- is at a low level, and the storage capacitor CT begins to discharge to drive the second switch M2 and the first switch. M1 continues to be turned on until the voltage across the storage capacitor CT is lower than the driving voltage required for the ninth switch M9 to be turned on.

In the control circuit provided in this embodiment, the negative electrode of the battery cell is disconnected from the negative output terminal P- when the battery cell is idle, so as to prevent the problem of self-consumption of the control circuit; when the battery is connected to the load, the control unit 11 is powered on. The seventh switch M7 is turned on by receiving the first sub-control signal from the negative output terminal P- to be turned on under the driving of the first sub-control signal, and simultaneously drives the sixth switch M6 to turn on to charge the storage capacitor CT; the storage capacitor The CT discharges the integral delay unit 141, and drives the ninth switch M9 to conduct, and then drives the second switch M2 to conduct. This process can not only avoid the problem of frequent circuit interruptions, but also prolong the power supply time of the battery for the load; After the protection unit 12 is powered on, it sends a third control signal to the first switch M1, and the first switch M1 turns on the negative electrode of the cell and the negative output terminal P- under the drive of the third control signal, so that the cell can supply power to the load After the load is powered on and started, the power-on control unit 11 can receive the second sub-control signal through the communication data port DA, and continue to drive the ninth switch M9, the second switch M2 and the second sub-control signal under the driving of the second sub-control signal. A switch M1 is turned on, so that the cell continues to supply power to the load. Therefore, it can not only realize the power supply of the battery cell to the load on the basis of avoiding adding a new control port, but also avoid the self-consumption problem of the control circuit when the battery cell is idle; at the same time, it will not increase the battery with the control circuit. volume, which can save production costs.

Please refer to FIG. 10 , which is a schematic structural diagram of a battery provided by an embodiment of the application; in this embodiment, a battery 1 is provided, and the battery 1 has a control circuit 10 , and the control circuit 10 can be specifically the above-mentioned embodiment For the specific structure, connection relationship and working principle of the control circuit involved, reference may be made to the relevant text description of the control circuit in any of the above embodiments, and details are not repeated here.

In a specific embodiment, such as an explosion-proof battery, the explosion-proof battery has the control circuit involved in the above embodiment; assuming that the capacity of the explosion-proof battery is 2400mAh, it is charged 30% when leaving the factory, that is, 720mAh; under normal working conditions, the explosion-proof battery The total current consumption of the battery is about 196.5uA. When the first switch M1 is turned off and the explosion-proof battery enters a power saving state, the total consumption current of the explosion-proof battery is about 3.5uA. It can be seen that the use of the control circuit 10 can greatly reduce the self-consumption power of the battery 1 and prolong the service life of the battery 1 .

The battery 1 provided in this embodiment, by setting the control circuit provided in the above embodiment, can not only supply power to the load when the load is connected, but also can effectively avoid the problem of self-consumption of the control circuit 10 when the battery 1 is idle; at the same time, The volume of the battery 1 is not increased, and the production cost can be saved.

The above are only the embodiments of the present invention, and are not intended to limit the scope of the patent of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, All are similarly included in the scope of patent protection of the present invention.

Claims

A control circuit, wherein the control circuit is applied to a battery, the battery includes a battery cell, a positive output terminal and a negative output terminal, and the positive output terminal and the negative output terminal are used to connect to the power supply terminal of a load respectively , to supply power to the load; the positive input terminal is connected to the positive pole of the battery cell, wherein the control circuit includes:

a first switch, connected between the negative electrode of the battery cell and the negative output terminal, wherein when the battery is not connected to the load, the first switch controls the negative electrode of the battery cell and the negative electrode The path between the output terminals is disconnected, and the voltage on the negative electrode of the cell is used as the ground voltage;

the second switch;

a power-on control unit connected to the second switch, wherein when the battery is connected to the load, the power-on control unit works to turn on the second switch;

The battery protection unit includes a power terminal, a ground terminal and a first control terminal, wherein the ground terminal of the battery protection unit is connected to the ground voltage, and the power terminal of the battery protection unit is connected to the The positive electrode of the battery cell, the first control terminal of the battery protection unit is connected to the first switch; when the second switch is turned on, the power supply terminal of the battery protection unit and the positive electrode of the battery cell are connected. The path between the two is turned on, so that the battery protection unit works, and the first control terminal of the battery protection unit sends a first control signal to turn on the first switch, turning on the negative electrode of the battery cell and all the path between the negative output terminals.
The control circuit of claim 1, wherein the power-on control unit comprises:

a first power-on control module, connecting the negative output terminal and the second switch, wherein the first power-on control module receives the voltage on the negative output terminal, so that when the battery is connected to the load , the positive electrode of the battery cell is connected through the load, so as to work to turn on the second switch; and after the first switch is turned on, the first power-on control module stops working;

The second power-on control module is connected to the second switch, wherein when the second switch is turned on, the second power-on control module works, so that after the first power-on control module stops working, The second power-on control module controls the second switch to be continuously turned on.
The control circuit according to claim 2, wherein the first power-on control module comprises:

A third switch, wherein the control terminal of the third switch is connected to the negative output terminal, the first channel terminal of the third switch is connected to the control terminal of the second switch, and the The second via terminal is connected to the ground voltage.
The control circuit according to claim 3, wherein the second power-on control module comprises:

a fourth switch, wherein a control terminal of the fourth switch is connected to a first node between the second switch and the power terminal of the battery protection unit, and a first path terminal of the fourth switch is connected to to the control terminal of the second switch, and the second pass terminal of the fourth switch is connected to the ground voltage;

Wherein, after the second switch is turned on, the control terminal of the fourth switch receives the voltage on the positive electrode of the battery cell through the second switch that is turned on, so that the fourth switch is turned on , the second power-on control module works to keep the second switch on.
The control circuit of claim 4, wherein the second power-on control module further comprises a resistor, and a control terminal of the fourth switch is connected to the second switch and the battery protection unit through the resistor the first node between the power terminals.
5. The control circuit of claim 4, wherein the battery protection unit further comprises a data port and a second control port, wherein the data port is configured to communicate with the battery when the battery is connected to the load The data port of the load is connected for data communication;

When the real-time duration of the data port interrupting the data communication with the load exceeds a preset duration, or when the data received by the data port indicates that the working current of the battery cell is lower than the preset current value, the real-time duration exceeds the preset duration. After the time period is set, the battery protection unit sends a second control signal at the second control port to stop the second power-on control module from working.
The control circuit of claim 6, wherein the power-on control unit further comprises:

The power-off control module is connected to the second control terminal of the battery protection unit and the second power-on control module. When the second control terminal sends the second control signal, the power-off control module works, so that the second power-on control module stops working.
The control circuit according to claim 7, wherein the power-down control module comprises:

A fifth switch, wherein the control terminal of the fifth switch is connected to the second control terminal of the battery protection unit, the first channel terminal of the fifth switch is connected to the second power-on control module, and the The second pass terminal of the fifth switch is connected to the ground voltage.
The control circuit according to claim 8, wherein the first switch, the third switch, the fourth switch and the fifth switch are N-type MOS transistors respectively, and the second switch is P type MOS tube.
A battery comprising the control circuit of claim 1 .